8 mg/L). The rdxA gene fragment (886 bp) of H. pylori was amplified by PCR and then sequenced. Finally polymorphism analysis was performed in the rdxA gene sequence from those strains resistant or susceptible to Mtz and standard strains H.pylori 26695. Results A total of 47 H.pylori strains were isolated from 51 patients positive for rapid urease test. Mtz resistance rate was 34% by E-test method and 31.9% by breakpoint susceptibility testing. Among them 15 strains were resistant to Mtz by the two tests. The rdxA genes of both 15 strains resistant to Mtz and 8 strains susceptible to Mtz were sequenced. Compared with that of strain H.pylori 26695, the sequence of rdxA gene nucleotide in 15 H.pyloristrains resistant to Mtz showed similarity ranging from 90% to 95% and being 92.5% on average, and the sequence of rdxA gene nucleotide in susceptible strains showed similarity ranging from 94% to 95% and being 94.5% on average. In most resistant strains, the rdxA genes occurred point mutation, single nucleotide insertion or deletion, however, the insertion or deletion of large nucleotide fragment were rare, and mutational site were variable. Conclusions The rdxA gene mutation in H.pylori strains resistant to Mtz may result from point mutations in several bases or insertional mutations or deletional mutations in one base, without insertion or deletion of large neuclectide fragment, and mutational position being variable.

Objective To compare the prognoses in pregnancy women receiving routine perineal shaving and non perineal shaving before vaginal delivery through meta analysis.Methods The randomized controlled trials or non-randomized controlled trials for comparing the prognoses in pregnancy women receiving routine perineal shaving and non perineal shaving before vaginal delivery were retrieved from databases,including Cochrane Library,PubMed,EMbase,SCI,Ovid,CBM,Wanfang,VIP and CNKI,till December 2015.The studies were selected according to the inclusion and exclusion criteria,and the data were extracted and evaluated by two reviewers independently.The Meta-analysis was conducted via RevMan 5.2.6 software.Results A total of 6 studies (including three articles in English and three ones in Chinese) including 1 924 delivery women were included,1 083 cases in the perineal shaving group and 841 cases in the non perineal shaving group.No statistically significant difference was found in the incidence rate of fever after delivery between the perineal shaving group and the non perineal shaving group[Z=0.57,P=0.57,RR=1.14,95 ％ CI(0.73,1.76)],and there was no statistically significant difference in post-operative wound infection between the two groups [Z=0.43,P=0.66,RR=1.11,95％CI(0.69,1.78)].Conclusion Perineal shaving may be not an essential nursing intervention before vaginal delivery.

Objective To study the esophageal motor function in patients with reflux esophagitis (RE) and Barrett esophagus ( BE). Methods Patients with reflux esophagitis and Barrett esophagus which were diagnosed by endoscopy were recruited for symptomatic investigation, Twenty-seven patients with RE, 18 patients with BE and 12 non-reflux patients as controls were recruited prospectively for stationary esophageal manometry and 24-hour ambulatory esophageal pH monitoring. Results Besides dysphagia, the symptom scores of heartburn, acid regurgitation and retrosternal pain in BE groups were lower than those in RE groups (P 0. 05). DeMeester score of 24-hour ambulatory esophageal pH monitoring, total times of pH

256 mg/L) are resistant to metronidazole by two tests. The level of transcripts of rdxA genes significantly reduced the total RNA in Helicobacter pylori grown with metronidazole compared to that without metronidazole. And the expression of the galE gene used as the control was unchanged. Conclusion The low expression of the rdxA gene may play a role in the development of metronidazole high resistant Helicobacter pylori isolates.

Objective To construct pSUPER-ARPC2 vector and to obtain its expression in eukaryotic cell, in order to down-regulate the expression of ARPC2. Methods Oligonucleotide sequences specific for ARPC2 were designed for RNAi, and cloned into pSUPER.basic vector after annealing by restriction enzyme digestion and ligation. After identification by restriction enzyme digestion and sequencing, the plasmid of positive clones was transfected into HEK 293 cells for three times. The expression of ARPC2 was detected by RT-PCR and Western blot. Results It was found that the expression of ARPC2 was definitely knocked down by transfection with pSUPER-ARPC2. Conclusions The RNAi expression vector of ARPC2 was constructed successfully, which was showed to possess the ability to knockdown the expression of ARPC2 by different methods. So, pSUPER-ARPC2 should be a powerful tool in the study of function of ARPC2.

Objective To investigate the effect of telephone call follow-up on compliance with opening-mouth exercises among nasopharyngeal carcinoma(NPC)patients with radiotherapy-induced difficulty in opening mouth.Methods Sixty four nasopharyngeal carcinoma patients undergoing radiotherapy were randomized into control group(n=31)and observation group(n=31).The former group was given health education and instructions for functional exercises of opening mouth at discharge and regular return visits after discharge,and the observation group received regular telephone call follow-ups by an appointed nurse besides the same treatment as in the control group.The two groups were compared in regard to the compliance with the exercises of opening mouth and the incidences of difficulties in opening mouth at the first and second years after discharge. Results The compliance of the observation group was significantly higher that in the control group(P<0.01).The incidences of difficulties in opening mouth in the observation group were significantly smaller than that in those of the control at the first and second years after discharge(P<0.01). Conclusion Telephone call follow-ups are effective in the improvement of compliance of functional exercises in NPC patients with radiotherapy-induced difficulty in opening mouth,the reduction of the incidence of mouth-opening problems and the improvement of their quality of life.

Objective To explore the relationship of content of plasma endothelin(ET)-1 with the change of pulmonary function in patients with chronic obstructive pulmonary disease(COPD).Method Thirty cases of the normal people were as group A ,34 cases of the patients with COPD with acute exacerbation before treatment were as group B and the patients with remission period after treatment were as group C,the plasma ET-1,arterial blood gas and pulmonary function parameters were determined from the patients before and after treatment.Results The plasma ET-1 in group B and group C were significantly higher than that in group A,the content of the plasma ET-1 had negatively correlated with PaO2,and that had positively correlated with PaCO2,P＜0.01.The pulmonary function parameters (VC,FEV1/FVC,MVV,V50 V25)in group B were significantly lower than those in group A and group C[(55.3±24.5)%,(54.8±19.3)%,(54.2±16.2)%,(54,8±9,9)%,(58.7±14.5)%;(114.8±24.1)%,(84.9±21.6)%,(86.4±17.2)%,(78.5±14.8)%,(90.3±15.4)% and (110.1±19.4)%,(85.8±15.5)%,(85.9±16.7)%,(74.5±13.4)%,(89.4±18.6)%,respectively],P＜0.01.Conclusion Pathophysiological effects of patients with COPD can be commonly adjusted by the plasma ET-1,oxygen and carbon dioxide retention,which affect pulmonary function.

Objective To research the functions and design methods of data center for regional collaborative healthcare.Methods Combined with the informatization of regional collaborative healthcare,the necessary for constructing the regional medical data center was analyzed,with its task and implementation discussed.Results A set of solution to data storage,service and coding in the data center for regional collaborative healthcare was put forward.Conclusion The data center promotes the informatization of regional collaborative healthcare.

Objective To investigate four methods for establishing animal models of human breast cancer bone metastasis. Methods Thirty-two female nude mice aged 4-6 weeks were divided randomly into four groups (n=8 in each group). 5×105 MDA-MB-231 cells were injected into the body via the left second mammary fat pads (group A), the tail veins (group B), the left heart ventricles (group C) and the left tibia marrow cavities (group D), respectively. Tumor formations in situ were recorded in group A. Deaths after the injection were recorded. The surviving nude mice 49 days after the injection were subjected to pathological examination to determine bone metastasis. Results The rate of tumor formation in situ of group A was87.5 %(7/8). One mouse in group C died after the injection of MDA-MB-231 cells. The bone metastasis rate in groups A, B, C and D was zero (0/8), 12.5 % (1/8), 71.4 % (5/7) and 100 % (8/8), respectively. There was statistically significant difference in the bone metastasis rate between group A and group C, group A and group D, group B and group C; and group B and group D. Conclusion Injections of tumor cells via the breast fat pads and tail veins were not suitablemethods to establish animal models of human breast cancer bone metastasis. The bone metastasis model could be established efficiently by injecting tumor cells into the left heart ventricles or the bone marrow cavity of nude mice.